729920047 has 4 divisors (see below), whose sum is σ = 730635976. Its totient is φ = 729204120.

The previous prime is 729920033. The next prime is 729920057. The reversal of 729920047 is 740029927.

729920047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729920047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729919991 and 729920009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729920027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356433 + ... + 358474.

It is an arithmetic number, because the mean of its divisors is an integer number (182658994).

Almost surely, 2^729920047 is an apocalyptic number.

729920047 is a deficient number, since it is larger than the sum of its proper divisors (715929).

729920047 is a wasteful number, since it uses less digits than its factorization.

729920047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715928.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 729920047 is about 27017.0325350509. The cubic root of 729920047 is about 900.3784609948.

The spelling of 729920047 in words is "seven hundred twenty-nine million, nine hundred twenty thousand, forty-seven".